وَأَوْفُوا الْكَيْلَ إِذا كِلْتُمْAnd give full measure when you measure.meaning, do not try to make it weigh less nor wrong people with their belongings.وَزِنُواْ بِالقِسْطَاسِand weigh with a balance,meaning scales,الْمُسْتَقِيمِthat is straight.meaning that which is not distorted nor that which will cause confusion.ذَلِكَ خَيْرٌthat is good,for you, in your daily life and in your Hereafter.So Allah says:وَأَحْسَنُ تَأْوِيلًand better in the end.meaning, with regard to your ultimate end in the Hereafter.ذَلِكَ خَيْرٌ وَأَحْسَنُ تَأْوِيلًThat is good (advantageous) and better in the end.Sa`id narrated that Qatadah said that this means"Better in reward and a better end."Ibn Abbas used to say:"O people, you are entrusted with two things for which the people who came before you were destroyed - these weights and measures."